25573641 has 4 divisors (see below), whose sum is σ = 34098192. Its totient is φ = 17049092.

The previous prime is 25573633. The next prime is 25573649. The reversal of 25573641 is 14637552.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (25573633) and next prime (25573649).

It is a cyclic number.

It is not a de Polignac number, because 25573641 - 2³ = 25573633 is a prime.

It is a super-2 number, since 2×25573641² = 1308022227993762, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25573649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4262271 + ... + 4262276.

It is an arithmetic number, because the mean of its divisors is an integer number (8524548).

Almost surely, 2^25573641 is an apocalyptic number.

It is an amenable number.

25573641 is a deficient number, since it is larger than the sum of its proper divisors (8524551).

25573641 is an equidigital number, since it uses as much as digits as its factorization.

25573641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8524550.

The product of its digits is 25200, while the sum is 33.

The square root of 25573641 is about 5057.0387580085. The cubic root of 25573641 is about 294.6213316265.

The spelling of 25573641 in words is "twenty-five million, five hundred seventy-three thousand, six hundred forty-one".